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import java.util.regex.*; class RegexExample6{ public static void main(String args[]){ System.out.println(Pattern.matches("[a-zA-Z0-9]{6}", "arun32"));//true System.out.println(Pattern.matches("[a-zA-Z0-9]{6}", "kkvarun32"));//false (more than 6 char) System.out.println(Pattern.matches("[a-zA-Z0-9]{6}", "JA2Uk2"));//true System.out.println(Pattern.matches("[a-zA-Z0-9]{6}", "arun$2"));//false ($ is not matched) }}
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